December 18, 2025 · Form 4 insider transaction
Imhoff John E bought 195,460 shares of GTHP at $0.07 per share, a transaction worth $13.7K. The trade was recorded as conversion of a derivative and disclosed on an SEC Form 4.
On December 18, 2025, Dr. Imhoff converted $13,682.19 outstanding under a September 25, 2025 Convertible Promissory Note into 195,460 shares of common stock at a conversion price of $0.07 per share. The amount converted consisted of $10,000 of principal and $3,682.19 of accrued interest. Following the reported conversion, $150,000 of principal remains outstanding under the convertible promissory note. Upon the occurrence of an event of default, the remaining balance is convertible into common stock at a variable conversion price determined in accordance with the terms of the note.